remove superfluous stopPolling

templates/dil5.html

@@ -264,7 +264,6 @@
 
     function onClose(evt) {
         writeToScreen("disconnected\n");
-        stopPolling();
     }
 
     function onError(evt) {
@@ -272,7 +271,6 @@
             writeToScreen("Unable to connect to DIL5 as websocket is not connectable\n");
         } else {
             writeToScreen("error: " + evt.data + '\n');
-            stopPolling();
             websocket.close();
         }